give us a call if you like - 1-480-659-9899 (M-T-TH-F 7am-12noon MST) and we&#039;ll help to determine exactly what you need. We do have parts for older NN3&#039;s that are not listed in the store. You can also use this chart to reference the part number. Older NN3 to the left and newer NN3 MKII to the right.